Convert an audio file
Upload any audio and pick the output format: MP3, WAV, M4A, OGG, OPUS, FLAC or AIFF. Nothing is uploaded to any server. You can upload several at once: they come back in a ZIP.
Your files never leave your device
How to convert an audio file
- 1
Upload the audio
MP3, WAV, M4A, AAC, FLAC, OGG, OPUS, AIFF, WMA…
- 2
Pick the format
MP3, WAV, M4A, OGG, OPUS, FLAC or AIFF.
- 3
Download the result
Converted with the proper codec for each format.
Why use this tool
Seven outputs
From universal MP3 to lossless FLAC, including modern OPUS.
Proper codecs
Each format uses its native codec with sensible settings, not a generic "converter".
Private
Your audio never leaves your device: ffmpeg runs inside your browser.
Real engine
ffmpeg, the industry standard, compiled to WebAssembly and self-hosted.
Frequently asked questions
Which format should I pick?
MP3 for universal compatibility; M4A/OPUS for better quality at the same size; WAV/FLAC/AIFF for editing or lossless archiving.
Does converting to FLAC improve an MP3?
No: what the MP3 lost never comes back. FLAC only guarantees nothing further is lost from here on.
Is there a size limit?
Your browser’s: up to 250 MB per file works fine on normal machines.